Function xmovable

Libs/sol/sol.hpp:8778–8785

namespace sol {
	namespace detail {
		inline bool xmovable(lua_State* leftL, lua_State* rightL) {
			if (rightL == nullptr || leftL == nullptr || leftL == rightL) {
				return false;
			}
			const void* leftregistry = lua_topointer(leftL, LUA_REGISTRYINDEX);
			const void* rightregistry = lua_topointer(rightL, LUA_REGISTRYINDEX);
			return leftregistry == rightregistry;
		}
	} // namespace detail

	class stateless_stack_reference {